Explanation:

- The idiom "Out of the question" refers to something that is completely impossible or not allowed.

- Option 1: Not possible at all - This is the correct meaning of the idiom. It suggests that there is no possibility for something to happen.

- Option 2: Very badly written - This option does not relate to the idiom. It describes poor writing quality.

- Option 3: Very difficult - This suggests that something is hard to achieve, but not necessarily impossible. This is different from "out of the question," which means completely impossible.

- Option 4: Not in the syllabus - This refers to something not included in a course content, which doesn't relate to the idiom’s meaning.

- Answer: Option 1 - Not possible at all